Hey there!
If Eli earned $20 for every 4 hours she works, that means that she earned $5 per hour, which I found by simply dividing $20 by 4.
You can look at Jan's earnings on the graph that she earns $6 per hour, which is a dollar more than Eli. You can also look at Jan's earnings after 4 hours to see that it is 4 dollars more than what Eli earns. This is due to the fact that she earns $6 per hour and after 4 hours has earned $24 instead of Eli's $20.
Because of this, your answer will be Jan earns more money than Eli, which is your third option.
Hope this helped you out! :-)